Java Program to Implement a 2D Point Class with Printing and Equality Check

Question: Java Program to Represent a 2D Point

Task:
Write a Java class to represent a 2D point with coordinates (x, y). Your class should be able to:

1. Create a point with given x and y values.

2. Print the coordinates of the point.

3. Compare two points to check if they are equal.

Hints / Help Points:

• Use private variables for x and y.

• Create a constructor to assign values to the point.

• Create a method printCoordinates() to display the point like (x, y).

• Create a method equals(Point other) to compare two points.

• Optional: Override equals(Object obj) if you want it to work with Java collections.

Example Usage:

Point p1 = new Point(3, 4);
Point p2 = new Point(3, 4);

p1.printCoordinates();           // Output: (3, 4)
System.out.println(p1.equals(p2)); // Output: true

Solution:

// Class to represent a 2D Point
class Point {
    private int x; // x-coordinate
    private int y; // y-coordinate

    // Constructor to initialize the point
    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }

    // Method to print coordinates
    public void printCoordinates() {
        System.out.println("(" + x + ", " + y + ")");
    }

    // Method to compare two points
    public boolean equals(Point other) {
        return this.x == other.x && this.y == other.y;
    }
}

// Test class
public class TestPoint {
    public static void main(String[] args) {
        Point p1 = new Point(3, 4);
        Point p2 = new Point(3, 4);
        Point p3 = new Point(5, 6);

        // Print points
        p1.printCoordinates(); // Output: (3, 4)
        p3.printCoordinates(); // Output: (5, 6)

        // Compare points
        System.out.println(p1.equals(p2)); // true
        System.out.println(p1.equals(p3)); // false
    }
}

Explanation:

1. Point class has private variables x and y.

2. The constructor sets the values when a point is created.

3. printCoordinates() prints the point in (x, y) format.

4. equals(Point other) checks if another point has the same coordinates.

✅ This solution is simple, easy to understand, and works perfectly for Class 11 students.